<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>js数据类型</title>
    <script type="text/javascript" src="../tool.js"></script>
</head>
<body>
<script type="text/javascript">
    var x = 'the answer is' + 42;
    var y = 42 + 'the answer is';


    Ulog.w(x);//the answer is42
    Ulog.w(y);//42the answer is
    Ulog.w("37" + 7);//377




</script>
</body>
</html>










